Antonyms of noun ascent

1 of 3 senses of ascent

Sense 1
ascent, acclivity, rise, raise, climb, upgrade -- (an upward slope or grade (as in a road); "the car couldn't make it up the rise")
       Antonym of descent (Sense 5)
      => descent, declivity, fall, decline, declination, declension, downslope -- (a downward slope or bend)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun ascent

3 senses of ascent

Sense 1
ascent, acclivity, rise, raise, climb, upgrade -- (an upward slope or grade (as in a road); "the car couldn't make it up the rise")
       => slope, incline, side -- (an elevated geological formation; "he climbed the steep slope"; "the house was built on the side of a mountain")

Sense 2
rise, rising, ascent, ascension -- (a movement upward; "they cheered the rise of the hot-air balloon")
       => change of location, travel -- (a movement through space that changes the location of something)

Sense 3
rise, ascent, ascension, ascending -- (the act of changing location in an upward direction)
       => motion, movement, move -- (the act of changing location from one place to another; "police controlled the motion of the crowd"; "the movement of people from the farms to the cities"; "his move put him directly in my path")